I am making a bridal shower cake with gumpaste fowers and i dont want to put them on too soon. How long will the fowers last before they start to wilt or will they on the buutercream? TIA.

As long as they are fully dried and you are not putting the cakr in the fridge, they shouldbe ok overnight in a room with AC.
Edna

Thanks so much. It is for tomorrow, I wanted to finish it tonight but I was afraid the flowers would wilt by the afternoon.

I let my fowers fully dry. The resons they can wilt is, hot house, flowers made fondant, or not enough time to let the flowers dry
Edna